vfio/pci: fix potential memory leak in vfio_intx_enable()

If vfio_irq_ctx_alloc() failed will lead to 'name' memory leak.

Fixes: 18c198c ("vfio/pci: Create persistent INTx handler")
Signed-off-by: Ye Bin <[email protected]>
Reviewed-by: Kevin Tian <[email protected]>
Acked-by: Reinette Chatre <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alex Williamson <[email protected]>

Author: Ye Bin

drivers/vfio/pci/vfio_pci_intrs.c

@@ -267,8 +267,10 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev,
 		return -ENOMEM;
 
 	ctx = vfio_irq_ctx_alloc(vdev, 0);
-	if (!ctx)
+	if (!ctx) {
+		kfree(name);
 		return -ENOMEM;
+	}
 
 	ctx->name = name;
 	ctx->trigger = trigger;